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Full text of "Practical Organic Chemistry"

3*4

PRACTICAL ORGANIC CHEMISTRY

upon dimethylaniline in presence of zinc chloride, and subse-
quent oxidation of the product, may be interpreted on similiar
lines, and has already been referred to. (See notes on Prep. 59, p.
279).

xC6H5

l^""H\ CCH4N(CH3)2
.    HjC(iH4N(CH3)2

/C6H5       -
HCf-Q;II4N(CH,)o"

\cfiii4N(cii;).>

/C6H5

HC~-QH4N(CH3)2
\C(;H4N(C1L).2

Leukobase of
malachite green.

X:8IIfi
O  =   IIO.C~C(;II4N(CII,)o

P>ase of malachite
green.

The preparation of " crystal violet" from Michler's compound
and dimethylaniline in presence of POCL may be explained in a
similar fashion,

nr XC(;II4N(CII,)o                  Xy-I4N(CIIs)o

UL\Q5II4N(CH,)o   =  IIO.C^CGH4N(CII,).,

+ HCGH4N(C'IL)2               \C(iH4N(CIL>)o

Base of crystal
violet.

The constitution of thehydrochlorides of malachite green and
crystal violet will appear as follows : 

C/CII5
 \r\CdlI4N(CIL),
	r/C,,H4N(CHs)2
 ^CV.U.NICH,),

C
	yv

x\
 IIC/       ^CII                                PIC
	x Yn

IIC^        /Cll                              IIC
	\ /cn

\/
	\/

c
	c

N(CH3)2
	N(CH3)2

1
	1

Ci
	Cl

Malachite green.                                            Crystal violet.
	
PREPARATION 104,
Phthalic Acid.    In the formation of phthallc acid by the
oxidation of naphthalene with sulphuric acid, the mercuric ^ul-